Xrefresh is a simple X program that causes all or
part of your screen to be repainted. This is useful when system messages
have messed up your screen. Xrefresh maps a window on top of the desired
area of the screen and then immediately unmaps it, causing refresh events
to be sent to all applications. By default, a window with no background
is used, causing all applications to repaint ``smoothly.'' However, the various
options can be used to indicate that a solid background (of any color)
or the root window background should be used instead.